Sources to Power Cosmic Reionization: Contribution of Galaxies and QSOs to the Ionizing Emissivity at z>6
1 : Leiden University
One important continuing question in extragalactic cosmology regards
the reionization of the neutral hydrogen in the universe. What were
the sources that drove cosmic reionization and over which time scale
did it occur? Over the last few years, we have increasingly good
constraints on the contribution of both galaxies and quasars to cosmic
reionization, as a result of deep lensing probes and wide-area blank
field probes for these sources. Simultaneously, significantly
improved constraints have been obtained on the escape fraction, the
Lyman-continuuum production efficiency, and also the prevalence of
faint quasars. In providing a review on cosmic reionization, I focus
in particular at how the ionizing emissivity from different sources
compare with what we can infer for the Universe as a whole.
| Subject : | : | Invited |
| Topics | : | Gas phase history of the cosmic web |
| PDF version | : |  PDF version |
